Valve grinding tool

ABSTRACT

A TOOL FOR GRINDING A VALVE BY HAND, THE TOOL COMPRISING A HANDLE SECURED TO AN L-SHAPED HEAD HAVING AN OPENING THERETHROUGH FOR BEING FITTED UPON THE VALVE STEM, THE HEAD INCLUDING A COMPRESSION COIL SPRING FOR BEARING AGAINST AN ENGINE MANIFOLD WHILE THE VALVE HEAD BEARS AGAINST THE VALVE SEAT.

1971 w. J. WINTERS 3,559,345

VALVE GRINDING TOOL Filed Jan. 8, 1969 flVl EA/TOE W/LL/4/V d. 'Zu/NrEes United States Patent Ofice 3,559,345 VALVE GRINDING TOOL William J. Winters, 8930 Kilburn, Houston, Tex. 77016 Filed Jan. 8, 1969, Ser. No. 789,830 Int. Cl. B24b 15/02 US. C]. 51-29 Claims ABSTRACT OF THE DISCLOSURE A tool for grinding a valve by hand, the tool comprising a handle secured to an L-shaped head having an opening therethrough for being fitted upon the valve stem, the head including a compression coil spring for bearing against an engine manifold While the valve head bears against the valve seat.

This invention relates generally to valve grinders.

A principal object of the present invention is to provide a valve grinding tool which will conveniently allow grinding a valve while the valve head is seated against a valve seat.

Another object of the present invention is to provide a valve grinding tool which can be easily installed and released.

Other objects of the present invention are to provide a valve grinding tool which is simple in design, inexpensive to manufacture, rugged in construction, easy to use and efiicient in operation.

These and other objects will be readily evident upon a study of the following specification together with the accompanying drawing wherein:

FIG. 1 is a side elevation view of the present invention shown in operative use; and

FIG. 2 is a perspective view of the present tool shown partly disassembled.

Referring now to the drawing in detail, the reference numeral 10 represents a valve grinding tool, according to the present invention, wherein there is a handle 11 which is secured to a working head 12.

The handle 11 comprises a generally elongated shank 13 having a cross-arm 14 at one end thereof, the opposite end of the shank including a threaded rod 15 which is threadingly engagable Within a threaded opening 16 of the L-shaped working head 12. The handle 11 is made from a hard steel, and the end thereof is serrated at 1511 so to avoid slipping when engaging the valve stem 18, in view that valve stems are generally a very hard steel.

The L-shaped working head 12 includes an opening 17 extending therethrough for purpose of receiving a valve stem 18 which at its opposite end has a valve head 19 that is seated Within a valve seat 20 of the engine manifold m. A compression coil spring 21 may be integrally made with the L-shaped working head 12, the compression coil spring 21 being in axial alignment with the opening 17 and being accordingly adaptable to receive the valve stem 18 therethrough. A washer 22 is positioned adjacent the outer end of the compression coil spring 21.

In operative use, in order to grind a valve, the working head 12 is inserted over the valve stem 18 as shown in FIG. 1 with the compression coil spring bearing against the engine manifold m, thus causing the valve head to bear against the valve seat. A set screw may also be employed for locking the Working head 12 upon the stem 18. During grinding operation it is of course desirable to frequently raise the valve head and insert grinding compound therebetween and the valve seat, after which the grinding may be continued.

3,559,345 Patented Feb. 2,, 1971 As shown in FIG. 1, a lock nut 23 is also mounted upon the threaded rod 15 for rigidly aflixing the handle to the working head.

What I now claim is:

5 1. A valve grinding tool for grinding valves in engines of the type having valve stem ends projecting from a first engine manifold surface with the opposite end of the valves including valve heads adapated to be seated in valve seats formed on a second engine manifold surface 10 comprising;

(a) working head means for securing said valve grinding tool to a valve stem end projecting from said first engine manifold surface;

(b) handle means connected with said working head means for imparting movement to said working head means; and

(c) spring means included with said working head means for biasing said working head means away from said first engine manifold surface whereby said valve head is biased against said valve seat formed in said second engine manifold surface.

2. A valve grinding tool as defined in claim 1 wherein said working head means further includes releasable friction locking means for frictionally locking said Working 25 head means to said valve stem end to prevent relative axial or rotational movement between said working head means and said valve stem end.

3. A valve grinding tool as defined in claim 1 wherein:

(a) said working head means includes a tubular body having an axially extending receiving bore adapted to be disposed about said valve stem end; and

(b) said spring means includes a coil spring secured to one axial end of said tubular body and extending substantially coaxially with said receiving bore formed in said tubular body.

4. A valve grinding tool as defined in claim 2 wherein:

(a) said working head means includes a tubular body having an axially extending receiving bore adapted to be disposed about said valve stem end; and

(b) said spring means includes a coil spring secured to one axial end of said tubular body and extending substantially coaxially with said receiving bore formed in said tubular body.

5. A valve grinding tool as defined in claim 2 wherein said friction locking means includes set screw means disposed in said working head means and movably radially with respect to said valve stem end for frictionally engaging said valve stem end.

6. A valve grinding tool as defined in claim 4 wherein said friction locking means includes set screw mean disposed in the wall of said tubular body and movab e substantially radially through said tubular body into said receiving bore for frictionally engaging said valve stem end.

7. A valve grinding tool as defined in claim 6 wherein:

(a) said set screw means includes an externally threaded member having first and second axially spaced ends and threadedly engaged with an internally threaded bore extending radially through said tubular body; and

(b) said handle means is connected with said first axial end of said externally threaded member whereby rotation of said handle means moves said externally threaded member radially through said tubular body.

8. A valve grinding tool as defined in claim 7 wherein said externally threaded member includes friction producing means formed at said second axial end of said member whereby said valve stem end is securely locked with respect to said tubular body when engaged by said second axial end of said member.

9. A valve grinding tool as defined in claim 8 wherein 1,328,197 1/ 1920 Rand 51-29 said friction producing means include serrations formed 1,493,741 5/1924 Ellison 81--170 in said second axial end of said member. 1,832,606 11/ 1931 Zimmerman 81170 10. A valve grinding tool is defined in claim 9 wherein 2,419,728 4/ 1947 Porter 5129 said handle means further includes cross arm means ex- 3,358,533 12/1967 Wren 81128 tending laterally of said handle means for assisting in rotating said handle means- WILLIAM R. ARMSTRONG, Primary Examiner References Cited US. Cl. X.R.

UNITED STATES PATENTS 1O 81- 17() 1,307,296 6/1919 Gellerman 5129 

